Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
thong cong » trong cong, tong cong, thong thong
tam thanh » tam than, nam thanh, am thanh
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
tap toan » tap doan, tap quan, bai toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - canh trinh va thong cong ((tam thanh) or (tap toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - canh trinh va thong cong ((tam thanh) OR (tap toan)) ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - canh trinh va thong cong ((tam thanh) or (tap toan)) ban*.